*{
    box-siziing:border-box;
}
html,body,div {
    margin: 0;
    padding:0;
}
.game-container{
    position: relative;
    box-sizing: content-box;
    /*-moz-box-sizing: border-box;*/
    /*box-sizing: border-box;*/
    height:600px;
    width:502px;
    border: 1px solid green;
    margin: 0 auto;
    margin-top: 50px;
}
.game-main-panel{
    position: absolute;
    left: 100px;
    top: 0;
    width:302px;
    height:600px;
    border:1px solid red;
    box-sizing: border-box;
}
.panel{
    position:absolute;
}
.time-panel{

    top:0;
    left:0;
    width:100px;
    height:100px;
}
.help-panel{
    top:150px;
    left: 0;
    width:100px;
}
.level-panel{
    left:0;
    bottom:0;
    width:100px;
    height:100px;
}
.next-panel{
    top:0;
    right:0;
    width:100px;
    height:100px;
}
.setting-panel{
    top:150px;
    right: 0;
    width:100px;
}
.score-panel{
    bottom:120px;
    right: 0;
    width:100px;
    height:100px;
}
.high-score-panel{
    bottom:0;
    right: 0px;
    width:100px;
    height:100px;
}
.panel-header{
    background-color: orange;
    font-size: 20pt;
    text-align: center;
}
.panel-body{
    /*color:red;*/
    text-align: center;
}
.time-panel,.next-panel,.score-panel{
    border-bottom:1px solid green;
}